Test 4 - Questions on Final

Question 1

The color of your eyes is a normal polygenic trait

Answer 1

True

Question 2

Use the figure to match the following with a LETTER: This gland stores hormones produced by the hypothalamus.

Answer 2

D- Posterior Pituitary

Question 3

Use the figure to match the following with a LETTER: This gland produces melatonin.

Answer 3

C- Pineal gland

Question 4

Which of these is NOT found in the karyotype of a normal human male?

• 46 chromatids
• 46 chromosomes
• 92 DNA molecules
• X and Y chromosomes
• 23 pairs of homologous chromosomes

Answer 4

46 chromatids

Question 5

If one allele is not phenotypically expressed in the presence of another allele, we say that it is a(an) ______ allele.

Answer 5

recessive

Question 6

Germ cells have ______ unpaired chromosomes and are thus called _____ cells.

Answer 6

23; haploid (n)

Question 7

The allele for the cleft chin (C) is dominant to the allele for uncleft chin (c). A male and female who are both heterozygous for cleft chin have a child. What is the chance that this child will have an uncleft chin?

Answer 7

25%

Question 8

Use the figure to match the following with a LETTER: This gland produces glucocorticoids and mineralocorticoids.

Answer 8

K- Adrenal cortex

Question 9

The alleles posessed by all members of a population collectively are called the____.

Answer 9

gene pool

Question 10

Use the figure to match the following with a LETTER: This gland produces insulin and glucagon

Answer 10

G- Pancreas

Question 11

Critical thinking Question:

Which blood type would NOT be possible for children of a type AB mother and a type A father?

Answer 11

O

Question 12

Cancers in epiuthelial tissue are called ____

Answer 12

carcinoma

Question 13

Cancers in bone, other connective tissue, or muscle are called _____

Answer 13

Sarcoma

Question 14

Enviromental agents that can cause cancers are called ______

Answer 14

carcinogens

Question 15

The organ systems rudimentarily (initially) form durning the:

Answer 15

embryonic period

Question 16

Which of the following inplants in, or attaches to, the endometrium of the uterus?

Answer 16

blastocyst

Question 17

What follows immediately after fertilization occurs?

Answer 17

cleavage

Question 18

What is the neonatal period?

Answer 18

The first 6 weeks of life

Question 19

What does the ectoderm form?

Answer 19

nervous system and skin

Question 20

What does gastrulation accomplish?

Answer 20

formation of the three germ layers

Question 21

Which statement is true regarding telomeres?

Answer 21

Telomeres are DNA segments at each end of a chromosome

Question 22

Down Syndrome (trisomy-21) results from ______.

Answer 22

nondisjunction

Question 23

Which is NOT an embryonic membrane?

• amion
• yolk sac
• placenta
• chorion
• allantis

Answer 23

Placenta

Question 24

During implantation, the trophoblast divides into a superficial layer called the ____, which is composed of a multinucleate mass of cytoplasm.

Answer 24

syncytiotrophoblast

Question 25

In the blastocyst, the trophoblast will become ____, whereas the embryoblast will become ____.

Answer 25

part of the placenta; the embryo

Question 26

Twins produced when a single egg is fertilized are called ____ twins. Twins produced from 2 eggs ovulated at the same time are called ____ twins.

Answer 26

monozygotic; dizygotic

Question 27

Use the figure to match the following with a LETTER: This gland produces and releases a hormone that raises blood calcium levels.

Answer 27

J- Parathyroid glands

Question 28

What stimulates melatonin production?

Answer 28

Light and dark cycles

Question 29

Which hormone lowers blood glucose levels?

Answer 29

Insulin

Question 30

The effects of norepinephrine and epinephrine have nearly the same effects as the neurotransmitters of the:

Answer 30

Sympathetic Nervous System

Question 31

What hormones are produced by zone glomerulosa of the adrenal cortex?

Answer 31

Mineralocorticoids

Question 32

Which of the following is a gonadotropin? - GH - TRH - FSH - ACTH

Answer 32

FSH

Question 33

Which of the following is true regarding endocrine glands? - Their secretions may be released onto the body surface. - They have an unusually low density of blood capillaries. - They secrete their products by way of ducts. - They secrete substances that do not alter the metabolism of their target cells, but have extracellular effects. - They release thier secretions into the blood.

Answer 33

They release their secretions into the blood.

Question 34

Use the figure to match the following with a letter: | This neuroendocrine organ (gland) produces and releases Catecholamines

Answer 34

L- Adrenal Medulla

Question 35

Which of the following is the last step in the sequence of events happening when cyclic AMP (cAMP) acts as a second messenger?

Answer 35

Enzymes are activated or deactivated by the action of protein kinases