Question

How would the steps of sensory perception be affected if a person sustains damage to axons that lead from sensory receptors to the central nervous system?
        A) Reception would not be affected. However, signal transduction and perception will be incomplete.
        B) Perception would not be affected. However, signal transduction and reception will be incomplete.
        C) Signal transduction would not be affected. However, reception and perception will be incomplete.
        D) Reception and signal transduction would not be affected. However, perception will be incomplete.

D is wrong / what is the correct option

QUESTION 22
What stimulates Leydig cells in the testes to produce testosterone?
        A) FSH
        B) LH
        C) Inhibin
        D) Estrogen
        E) Progesterone
A is wrong

What are the mechanisms that protect and nurture the embryo in oviparous animals?
        A) The hard, leathery exterior of bird eggs and the hard calcium covering of reptile
        eggs provide protection to the growing embryo. Nourishment is provided by yolk in the eggs.
        B) The hard, leathery exterior of reptile eggs and the hard calcium covering of bird eggs provide protection to the growing embryo. Nourishment is provided by endosperm in the eggs.
        C) The hard, leathery exterior of reptile eggs and the hard calcium covering of bird
        eggs provide protection to the growing embryo. Nourishment is provided by placenta in the eggs.
        D) The hard, leathery exterior of reptile eggs and the hard calcium covering of bird
        eggs provide protection to the growing embryo. Nourishment is provided by yolk in the eggs.
A is wrong

Answer 1

Answer 1: If a person sustains damage to axons that lead from sensory receptors to central nervous system the steps of transduction and perception will be affected. Transmission of sensory information from the receptor to the central nervous system will be impaired because of damage to axon.Reception would not be affected. However, signal transduction and perception will be incomplete. So correct option is (a).Option b and c are not correct according to given explanation.

Answer 2: correct option is (b).

Leutenizing harmone (LH) stimulates Leydig cells in the testes to produce testosterone. It is also called  interstitial cell–stimulating hormone (ICSH).It stimulates Leydig cell production of testosterone. All other options are not correct.

Answer 3: correct option (d).

Most reptiles lay amniotic eggs covered with leathery or calcium-containing shells. The hard, leathery exterior of reptile eggs and the hard calcium covering of birds eggs provide protection to the growing embryo. Nourishment is provided by yolk in the eggs.

Option a is incorrect because birds eggs does not have hard leathery exterior. Reptiles eggs have hard leathery exterior. Option b and c is incorrect because nourishment to embryo is provided by yolk not by endosperm and placenta in reptiles and birds .