Sitting motionless for long periods, as on airline flights, allows blood to pool and clots to form in legs. Long-distance flights cause clot formation in about 1 percent of air travelers, and the risk is the same regardless of whether a person is in a first-class seat or an economy seat. Physicians recommend that air travelers drink plenty of fluids and periodically get up and walk around the cabin. Given what you know about blood flow in the veins, explain why these precautions can lower the risk of clot formation.

Q: List the components of the autonomic reflex arc. Compare with somatic reflex arc.

A: The glandular non-skeletal muscular response carried out in the body's internal organs, including th...

Q: Diagram the four stages of the nerve impulse, explaining how ion movements propagate the signal.

A: In human physiology, the phenomena of action potential refers to the rapid changes in the membrane p...

Q: All of the following are direct branches of the celiac trunkexcept thea. splenic artery.b. right gas...

A: Arteries are those blood vessels that carry oxygenated blood away from the heart. The coeliac trunk ...

Q: Trace the pathway nutrients must follow from bloodvessels in the periosteum to osteocytes within lac...

A: Bone is a rigid composite tissue that is a crucial element of the skeleton system and functions as a...

Q: describe the three layers of the heartwall;

A: Cardiovascular system's muscular organ that is anatomically divided into four chambers: two atria an...

Q: Define somite

A: Somite can be defined as block-like elements present in the Mesoderm and lie on one of the two sides...

Q: how does dehydration increase hematocrit?

A: The proportion of red blood cells present in the blood is defined as hematocrit. It is expressed as ...

Q: Define synchondrosis

A: In anatomy, the term synchondrosis is used to describe one of the types of cartilaginous joints (amp...

Q: Give the brain region for the functions described. 1. Contains vital centers that regulate heartbeat...

A: The central organ of the human nervous system is referred to as the brain. It makes up the central n...

Q: Which two ions are most affected by aldosterone?a. sodium and potassiumb. chloride and bicarbonatec....

A: In the cortex of the adrenal gland above the kidneys, aldosterone is synthesized. The body's ability...

Q: How could a diet deficient in vitamin A affect vision?

A: Vitamins are the substances which are required by the body for better health and performance of the ...

Q: What are the parts of the larynx: (select more one) A-Ventricles of the larynx B-Vestibule of the l...

A: The larynx (voice box or sound box) is an air passage that connects the pharynx with trachea. It con...

Q: Using the materials commonly found in a kitchen, explain how todistinguish between a protein and a l...

A: Biomolecules are organic compounds synthesized by living organisms. Biomolecules consist primarily o...

Q: How do we find out whether a vertebrate such as a cat or a salamander has a central pattern generato...

A: In the absence of rhythmic information, central pattern generators (CPGs) are biological neural circ...

Q: Define antigen. Distinguish between a foreign antigen anda self-antigen

A: The Immune system comprises a network of specialized cells, tissues, proteins and organs that acts a...

Q: Define haploid

A: A haploid can be defined as a cell that comprises only a single chromosome set. The haploid term rep...

Q: Compare the structure of the three types of capillaries.Explain the various ways that materials pass...

A: The cardiovascular system is also called the blood vascular or circulatory system, consists of a mus...

Q: What portion of the kidney is exquisitely sensitive to blood pressure and oxygen carrying capacity? ...

A: Kidney is responsible for production of urine, and also regulation of blood pressure. Nephrons in ki...

Q: Distinguish between endocrine and exocrine glands.

A: The endocrine system is made up of the endocrine glands that secrete hormones. Although there are ei...

Q: What factors affect the activity of chemoreceptors in the carotid and aortic bodies?

A: Chemoreceptors are the receptors that help in detecting various changes happening in our body such a...

Q: List the levels of organization in a human, starting at thesimplest level and proceeding to the most...

A: Living things are highly classified and structured, obeying a hierarchy that can be evaluated on a s...

Q: 2- Need help with following

A: The digestive system of the body extends from the mouth to the anus. The alimentary canal is the tub...

Q: What are the origin, insertion, and nerve supply for Long head of Biceps femoris muscle? origin: ins...

A: The biceps femoris is the thigh muscle that is found to its posterior side.  It usually makes the gr...

Q: Under stress _________________________ is released by the ______________________ and _______________...

A: Neurotransmitters are chemical messengers of the nervous system that are released from the terminal ...

Q: Define lemniscus

A: A secondary sensory fibres' bundle, which lies in the brain's brainstem region and usually terminate...

Q: Define atrial diastole

A: The cardiac cycle, which occurs during the time lapse between one heartbeat and the next, comprises ...

Q: .Describe the general features of a symphysis.?

A: The Joint is the part of the body where two bones connect together and allow movement. In the human ...

Q: Write the name of the structure that the phrase describes. Openings in the nipple

A: The nipples comprise 15 to 20 openings responsible for allowing the flow of milk as baby-nurses. The...

Q: Describe the role of secretory vesicles in the cell.

A: The secretory vesicle is a vesicle that mediates the vesicular transport of cargo - e.g. hormones or...

Q: Define chorion

A: The embryo produces four sets of extraembryonic membranes that act as mediators between it and the e...

Q: Define myofilament

A: The muscular layer is a soft tissue type. It is composed of muscle cells that are known as myocytes....

Q: Identify the structures of a spinal nerve and describe the neural pathways of a reflex arc.

A: Spinal nerves are the part of peripheral nervous system. There are 31 pairs of the spinal nerves in ...

Q: List key features that distinguish a eukaryotic cell from aprokaryotic cell.

A: The diverse organisms of the world are classified into several groups, depending on their structural...

Q: Where are serous and synovial membranes located, and what are their functions?

A: In human anatomy, the serous membrane can be described as the smooth membrane of a thin connective l...

Q: discuss which two rooms in your home or workplace that you believe are the most contaminated. Explai...

A: Contamination by bacteria is very common as they are omnipresent and grow in a wide range of environ...

Q: smoker develops damage to several alveoli that then can no longer function. How does this affect gas...

A: Respiratory system is a vital organ system in the human body that concerns the respiratory gases' ex...

Q: Write the name of the structure that the phrase.Covers and protects testes

A: Testes are the primary sex organs. They are extra abdominal because the temperature needed for the p...

Q: The lungs area. part of the mediastinum.b. surrounded by the pericardial cavity.c. found within the ...

A: The respiratory system transfers oxygen from inhaled air to the blood and carbon dioxide from the bl...

Q: Define catabolism

A: Metabolism applies to the assembly of hundreds of enzyme catalysed reactions employed by the organis...

Q: What are the two anatomical portions of the skeleton?

A: The skeleton is the supporting system of a life form. It is ordinarily made out of hard, inflexible ...

Q: How is an ecosystem different from an ecological community?

A: An ecosystem describes all the living organisms ( biotic components ) with their physical surroundin...

Q: What is the blood flow rate through a vessel given the following: ΔP = 120 mmHg; radius = 6 mm; leng...

A: Circulation of blood takes place in body through vessels. Heart pumps the blood with pressure to war...

Q: Describe the roles of receptor potentials andadaptation.

A: Senses provide information about the body and its environment. There are five major senses: sight, h...

Q: Case Study: Kim is a 38-year-old women admitted to the hospital for bulimia. Her laboratory results ...

A: Binge eating is a chronic eating disorder that is accompanied by methods to prevent weight gain.Buli...

Q: Identify the two regions of the adrenal gland, and list the hormones secreted by each.

A: The endocrine system consists of a group of glands and organs that regulate and control various body...

Q: Define choana

A: The pharynx is a muscular tube connecting the oral and nasal cavity to the larynx and esophagus. It ...

Q: What is anthropometrics and ergonometrics? And, what is its difference?

A: Anthropometrics is a term given to studies related to physical activities such as movement, usually ...

Q: Supination is the motion that moves the ________.a. hand from the palm backward position to the palm...

A: The joints in the skeleton allow movement which results in motion in the body.

Q: Define menarche.

A: The reproductive cycle in females is called menstrual cycle.

Q: Angiotensin II stimulates the __________________ to produce ____________________ A) Adrenal glands...

A: Hormones are chemical messengers that are discharged specifically into the blood, which carries them...