What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 25, Problem 4MC
Summary Introduction
Introduction:
Sex hormones are the chemicals responsible for regulating sex characteristics; they are all steroids.
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Many cells reduce testosterone to a steroid that has a higher affinity to the androgen receptor. What is the name of this steroid?
a.
Progesterone.
b.
Estradiol.
c.
Cortisol.
d.
5 α-dihydrotestosterone.
Which of the following is correct pairing of concepts? *
A. Male sex hormones: androgens
B. Pregnancy hormones: progestins
C. Female sex hormone: estrogen
D. After menopause hormones: estriol
In humans, which of the following are “gonadal hormones”? (click all that apply)
- LH
-GnRh
- estradiols
- FSH
- Testosterone
Chapter 25 Solutions
What Is Life? A Guide to Biology with Physiology
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- Estrogens stimulate the development of ______. sperm production facial hair a low-pitched voice breastsarrow_forwardEstrogen synthesis will be most selectively decreased through inhibition of which enzyme? a. CYP17 b. Aromatase c. 5-alpha-reductase d. 17-beta-HSDarrow_forwardA 38-year-old male is upset about his low sperm count and visits a "practitioner" who commonly advertises his miracle cures of sterility. The practitioner is a quack who treats conditions of low sperm count with megadoses of testosterone. Although his patients experience a huge surge in libido, their sperm count is even lower after hormone treatment. a) Which two glands would be responsive to the megadose of testosterone? b) Identify the two hormones that would be affected by the megadose of testosterone. Would their levels increase or decrease? c) What role, if any, would either of the affected hormones have on the man's reduced sperm count?arrow_forward
- Unlike the nervous system, the endocrine systema. uses chemical signals as a means of communication.b. helps maintain equilibrium.c. sends messages to target organs.d. changes the metabolism of cells.arrow_forwardevery individual is designed to have an organ system with its corresponding parts and functions. (a) What happens when your body does not produce enough hormones like testosterone? (b) what happens if too much estrogen is produced?arrow_forwardA scientist hypothesizes that the pancreas’s hormone production is controlled by neural stimuli. Which observation would support this hypothesis? a. Insulin is produced in response to sudden stress without a rise in blood glucose. b. Insulin is produced in response to a rise in glucagon levels. c. Beta cells express epinephrine receptors. d. Insulin is produced in response to a rise in blood glucose in the brain.arrow_forward
- Which hormone is primarily responsible for the contractions during labor? a. oxytocin b. estrogen c. -HCG d. progesteronearrow_forwardHormones are produced by ______________. a. endocrine glands and cells b. some neurons c. exocrine cells f. a, b, and c d. a and b e. a and carrow_forwardHormones are secreted directly into the bloodstream by the endocrine glands. ___________ ____________ ___________ __________arrow_forward
- What does folate deficiency in males cause? A. Blindness B. High sperm production C. Low sperm production D. Cardiovascular Diseasearrow_forwardUpon cutting your finger, the damaged skin releases chemicals that stimulate blood clotting so you don't bleed too much. These chemicals are most likely acting in which manner? A) Endocrine B) Paracrine C) Juxtacrine D) Autocrinearrow_forwardTransplant recipients need to take medications with immunosuppressive and anti-inflammatory properties. Which of the following hormones has been made into a drug and could be given to these patients? Select one: a. epinephrine b. aldosterone c. mineralocorticoids d. cortisolarrow_forward
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Great Glands - Your Endocrine System: CrashCourse Biology #33; Author: CrashCourse;https://www.youtube.com/watch?v=WVrlHH14q3o;License: Standard Youtube License