Introduction:
Cellular membrane, nucleus, and cytoplasm are the three major components of a cell. Cellular membrane which surrounds the entire cell is composed of phospholipids and proteins. Peripheral proteins are generally found on the membrane surface and are temporarily attached to one face of the plasma membrane. Membrane proteins that traverse the entire cell membrane alone can serve as a membrane channel. A membrane channel aids in the transfer of solutes from one side of the cell membrane, which is selectively permeable to the other side of the membrane. Such integral proteins are called as transmembrane proteins.
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Chapter 3 Solutions
LSC (CONCORDIA UNIV ST PAUL) BIO 315/316: B&N DPF Connect with APR and Phils Online Access for Anatomy and Physiology: The Unity of Form and Function 180 Day Access ENTRP
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- When the nervous system directly stimulates an endocrine gland and causes the secretion of a hormone from that endocrine gland, we call this _______ secretion of hormones. Group of answer choices Hormonal Digestive Neuronal Humoralarrow_forwardNearby, is the ___9____ which releases the hormone melatonin and, consequently, helps regulate sleep/wake cycles.arrow_forwardThe primary reason for downregulation/desentization of hormone receptors is: O metabolic clearance prolonged exposure abnormally high hormone levels normal physiological levelsarrow_forward
- Explain why hormones are only able to effect certain cells and not other cells.arrow_forwardGenerally, a cell that is affected by a particular steroid hormone would be expected to have ________. enzymes that are activated or inactivated by the hormone's second messenger a receptor inside the cell that binds the hormone a cell-surface receptor that binds the hormone DNA sites that interact with the hormonearrow_forwardHormone that enters the cell and binds to intracellular receptor is Cortisol GNRH GH FSHarrow_forward
- The advantage of portal circulation is that_____. it can deliver all of the hormone molecules made one gland to a second gland it ensures that endocrine hormones will be transported to all cells throughout the body it allows cells to make more of a hormone so they are more effective in stimulating target cells it prevents target cells from being desensitized by constant high levels of the hormonearrow_forwardSteroid hormones find their receptors inside of cells. True or Flase? This is true. Explain why this is not falsearrow_forwardendocrine hormones regulate the activities of tissue far from the tissue that secretes them - TRUE OR FALSEarrow_forward
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