animal physiology exam 6

B) neurohormones and neurotransmitters can be the same chemical

what description of a hormone is correct

A) hormones only have one function: stimulating gonadal growth

B) neurohormones and neurotransmitters can be the same chemical

C) hormones usually have a long half-life in blood circulation

D) most hormones are regulated by positive feedback

to enter bloodstream and regulate distant target organs

what is primary function of neurohormones

lipid soluble

steroids and fatty acid hormones require intracellular receptors because they are

endocrine

which secretion system requires blood circulation to transmit hormones?

F - they have the same function

T or F: there are 2 primary communication systems - neural system and endocrine system. physiological functions are regulated by one of them ; they cannot be regulated by both because the 2 have opposite functions

neurohormone / hormone

a neurotransmiter released to blood circulation can be called

GH and TSH

which hormones are produced by anterior pituitary and stimulates release of hormones from other endocrine glands

antagonist pairing hormones

insulin lowers blood glucose levels, glucagon raises blood glucose levels. these two are

true

the HHP system is a vascular system in the infundibulum that connects hypothalamus to anterior pituitary

false

T or F: the hypothalamic hormones (GnRH, GHRH, GHIH,CRH, and TRH) are all peptide hormones

false - anterior pituitary

hypothalamic hormones GnRH, TRH, GHRH, and CRH travel to posterior pituitary to stimulate secretion of hormones

C) T3 is most biologically important

which is right about T3 and T4?

A) they are secreted from parathyroid gland

B) they regulate blood calcium level

C) T3 is most biologically important

D) T3 increases metabolic rate and T4 inhibits heat production

endocrine and sympathetic

the animal stress response is the interaction between

C) some cells in adrenal cortex have receptors for ACTH

what is right about the adrenal glands

A) adrenal glands are paired structures behind thyroid gland

B) adrenal medulla is the outer layer

C) some cells in adrenal cortex have receptors for ACTH

D) adrenal medulla secretes cortisol and corticosterone

metabolism during stress

adrenal hormones such as cortisol, corticosterone, and epinephrine regulate

estrogen

which hormone stimulates mammary gland duct and cistern growth

middle and deeper layers of adrenal cortex which produce cortisol and coricosterone

what is the target tissue of ACTH

mammary gland

what is the target tissue of prolactin

dopamine

which hormone secreted from hypothalamus is an amine hormone

false

T or F: regulation from the endocrine system is always faster than the regulation from the nervous system

true

T or F: cortisol increases blood glucose when an animal feels stressed

prolactin

what hormone stimulates production and secretion of milk

stimulates IGF-1 production and activates muscle growth

Growth hormone function

testosterone

which hormone is secreted from leydig cells

androgen binding protein (ABP) and inhibin when FSH binds

sertoli cells secrete…..

both LH and FSH

the growth of follicles requires

a surge of estrogen produced by the follicles at ovulatory size causes a surge of GnRH release and surge of LH release

ovulation is triggered by…

corpus luteum

what is an important source of progesterone

False - progesterone not estrogen

T or F: after ovulation the estrogen produced from the corpus luteum has negative feedback to inhibit production of GnRH from PON of hypothalamus to inhibit production of LH from anterior pituitary

chemotaxis

the motivation for sperm movement from the vagina to uterus and then oviduct

negative feedback

release of a hormone has an effect to inhibit the secretion / release of this hormone - more common feedback mechanism

positive feeback

release of a hormone stimulates more synthesis and release of this hormone. less common feedback mechanism