Question

question 17
1 pts
membrane attached to the stapes.
tectorial membrane
oval window
pharyngotympanic
tympanic membrane
round window
question 18
1 pts
class of hormones secreted during chronic stress that depress immune function.
androgens
gonadotrophins
mineralocorticoids
amino acid - based hormones
glucocorticoids
question 19
1 pts
endolymph is made
from perilymph.
in the scala vestibuli.
in the stria vascularis.
from the dura mater.

Explanation:

• Question 17: The oval window is a membrane - covered opening that leads from the middle ear to the inner ear and is attached to the stapes. The tectorial membrane is in the cochlea and is not attached to the stapes. The tympanic membrane (eardrum) is in the outer - to - middle ear boundary. The pharyngotympanic tube connects the middle ear to the pharynx. The round window is also in the inner - ear/middle - ear boundary but is not attached to the stapes.
• Question 18: Glucocorticoids (such as cortisol) are secreted during chronic stress and have immunosuppressive effects. Androgens are male sex hormones. Gonadotrophins (like FSH and LH) are related to gonad function. Mineralocorticoids (like aldosterone) are involved in electrolyte balance. Amino - acid based hormones is a broad category that includes many hormones with different functions, not specifically those with chronic - stress - related immunosuppressive effects.
• Question 19: Endolymph is made in the stria vascularis. Perilymph has a different composition from endolymph and is not its precursor. The scala vestibuli contains perilymph. The dura mater is a meninges layer of the central nervous system and not involved in endolymph production.

Answer:

• Question 17: oval window
• Question 18: glucocorticoids
• Question 19: in the stria vascularis