1) enterogastric reflexes
a) inhibit gastric motility.
b) inhibit gastric secretion.
c) are triggered by chyme entering the duodenum.
d) involve the enteric nervous system.
e) all of the answers are correct.
2) melatonin is produced by the
a) thymus.
b) pineal gland.
c) kidneys.
d) skin.
e) heart.
3) during swallowing, the
a) intrinsic laryngeal muscles contract.
b) extrinsic laryngeal muscles contract.
c) glottis closes.
d) epiglottis is depressed.
e) all of the answers are correct.
4) which of these descriptions best matches the term colony stimulating factor?
a) adhere to collagen beneath endothelium
b) helper cells are one type
c) hormone that regulates blood cell formation
d) kill bacteria using hydrogen peroxide
e) often elevated in allergic individuals
5) the plasma membrane is composed of
a) a bilayer of proteins.
b) a bilayer of phospholipids.
c) carbohydrate molecules.
d) carbohydrates and proteins.
e) carbohydrates and lipids.
6) the region of the brain responsible for predicting the consequence of events or
actions is the
a) prefrontal cerebral cortex.
b) occipital association cortex.
c) reticular formation.
d) temporal lobe.
e) cerebral ganglia.
7) which of the following is not a component of the appendicular skeleton?
a) scapula
b) coxal bone
c) femur
d) sternum
e) humerus
8) which layer of a blood vessel contains concentric sheets of smooth muscle tissue?
a) tunica intima
b) external elastic membrane
c) tunica media
d) internal elastic membrane
e) tunica externa
9) which of these descriptions best matches the term b lymphocytes?
a) adhere to collagen beneath endothelium
b) helper cells are one type
c) produce antibodies in response to antigens
d) kill bacteria using hydrogen peroxide
e) often elevated in allergic individuals
10) when production of sex hormones increases at puberty, epiphyseal plates
a) get wider.
b) become narrower.
c) increase slowly.
d) accelerate rapidly, but mostly in thickness.
e) are hardly affected.
11) the pituitary gland and thyroid gland are organs of the ________ system.
a) endocrine
b) cardiovascular
c) respiratory
d) lymphatic
e) digestive
12) which statement(s) about the functions of the paranasal sinuses is/are true?
a) they provide an extensive area of mucous epithelium.
b) they make skull bones lighter.
c) the mucus they secrete enters the nasal cavities.
d) they support cilia that move the mucus.
e) all of the answers are correct.
13) anti-d antibodies are present in the blood of
a) all individuals with type ab blood.
b) rh negative individuals who have been exposed to the d surface antigen.
c) all rh positive individuals.
d) rh positive individuals who have been exposed to the d surface antigen.
e) all rh negative individuals.
14) how many tetrads form during synapsis?
a) 23
b) hundreds
c) thousands
d) 46
e) 4
15) during gastrulation,
a) the blastomeres fuse.
b) the placenta penetrates the endometrium.
c) three germ layers are formed.
d) cells from the hypoblast move to the epiblast.
e) the neural tube closes.
16) in response to respiratory alkalosis, the
a) respiratory rate increases.
b) tidal volume increases.
c) kidneys conserve bicarbonate.
d) kidneys secrete more hydrogen ions.
e) kidneys retain more hydrogen ions.