27. In the male, the hormone _____ stimulates the secretion of testosterone from
ID: 181051 • Letter: 2
Question
27. In the male, the hormone _____ stimulates the secretion of testosterone from ______.
a. LH ; interstitial leydig cells
b. ACTH; nurse cells
c. thyroid hormones epididymis
d. FSH; seminiferous tubules
e. GnRH; vas deferens
28. The______ secretes a fructose like fluid during ejaculation:
a. prostate gland
b. seminal vesicle
c. bulbourethral gland
d. epididymis
e. testes
29. The location in the ovary representing the most recent sire of ovulation is called the
a. corpus albicane
b. corpus luteum
c. corona radiata
d. corpus spongiosum
e. graffian follicle
30. Ovulation is caused by a dramatic increase in which of the following hormones:
a. estrogen
b. LH
c. FSH
d. Progesterone
e. GnRH
41. Contraction of the diaphragm and contraction of rib muscles causes the volume of thoracic cavity to:
a. increase
b. decrease
c. stay the same
42. As air passes into the respiratory tract:
a. it is warmed
b. it is moistened
c. particles are filtered and trapped
d. all of the choice are correct
43. Which is the correct description of the flow of blood to the proper structures?
a. Blood enters the right atrium though the aorta
b. Blood leaves the left ventricle through the aorta
c. Blood enters the left ventricle through the vena cava
d. Blood enters the right atrium through the pulmonary artery
44. A ballooning of an artery is called:
a. hypertension
b. stroke
c. aneurysm
d. atherosclerosis
e. myocardial infarction
45. When a portion of he heart muscle dies due to the lack of oxygen, it is called a heart attack or ____
a. hypertension
b. stroke
c. cerebrobvascular accident
d. myocardial infarction
46. Oxygenated blood flows through all of the following except:
a. pulmonary veins
b. pulmonary arteries
c. systemic arteries
d. coronary arteries
47. When you exercise you generate excess heat and your body temperature rises. Blood vessels to the skin, warm blood flows closer to the bodily surface, and you lose heat. This process is:
a. negative feedback
b. positive feedback
c. dynamic equilibrium
d. integration control
e. point adjustment
48. When a woman is giving birth, the head of the baby pushes against the cervix and stimulates release of the hormone oxytocin. Oxytocin travels in the blood and stimulates the uterus to contract. Contractions become more and more intense until the baby is expelled. This is an example of:
a. negative feedback
b. positive feedback
c. dynamic equilibrium
d. integration control
e. point adjustment
49. Pepsinogen is protected by _____ cells and is activated by ____.
a. chief; HCL secreted by parietal cells
b. chief; carbonic anhydrase secreted by parietal cells
c.parietal; HCl secreted by chief cells
d. parietal; carbonic anhydrase secreted by chief cells
e. exocrine cells; carbonic anhydrase secreted by parietal cells
50. Which of the following enzymes function at the lowest pH?
a. salivary amylase
b. pancreatic amylase
c. pepsin
d. trypsin
e. dipeptidase
51. Which of the following is most similar to the negative feedback effect in humans?
a. a car that runs out of has and stops
b. starting a bonfire with only a single match
c. a toilet tank that refills itself after a flush
d. a teacher marking all the wrong answers on a students exam
e. an automatic door opens when you approach it
52. Which of the following is most similar to the positive feedback effect in humans?
a. a car that runs out of has and stops
b. starting a bonfire with only a single match
c. a toilet tank that refills itself after a flush
d. a teacher marking all the wrong answers on a students exam
e. an automatic door opens when you approach it
53. Which of the following endocrine glands is located most inferiorly?
a. thyroid
b. thymus
c. adrenal gland
d. pineal body
e. pituitary gland
54. The nervous system reacts to stimuli ___ compared to the endocrine system, adapts _____ compared to the endocrine system and has _____ effects compared to the endocrine system.
a. slowly; slowly; widespread
b. quickly; slowly; specific
c. quickly; quickly; widespread
d. quickly; quickly; specific
e. slowly; quickly; specify
Explanation / Answer
Answer:
27). a. LH ; interstitial leydig cells
Leydig cells, also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH).
28). b. seminal vesicle
The seminal vesicles produce a sugar-rich fluid (fructose) that provides sperm with a source of energy and helps with the sperms’ motility (ability to move). The fluid of the seminal vesicles makes up most of the volume of a man’s ejaculatory fluid, or ejaculate.
29 b. corpus luteum
The corpus luteum is a temporary endocrine structure involved in ovulation and early pregnancy
30). b. LH
FSH stimulates the ovarian follicle, causing an egg to grow. It also triggers the production of estrogen in the follicle. The rise in estrogen tells your pituitary gland to stop producing FSH and to start making more LH. The shift to LH causes the egg to be released from the ovary, a process called ovulation.
41). a. increase
As the diaphragm contracts inferiorly and thoracic muscles pull the chest wall outwardly, the volume of the thoracic cavity increases.
42). d. all of the choice are correct
As air passes through the nasal cavities it is warmed and humidified, so that air that reaches the lungs is warmed and moist. The cilia present in the mucus filters the air.
43). b. Blood leaves the left ventricle through the aorta
The pulmonary vein empties oxygen-rich blood, from the lungs into the left atrium. Blood leaves left ventricles of the heart through the aortic valve, into the aorta and to the body. This pattern is repeated, causing blood to flow continuously to the heart, lungs and body.
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