Test 4 - Questions on Final Flashcards
The color of your eyes is a normal polygenic trait
True
Use the figure to match the following with a LETTER: This gland stores hormones produced by the hypothalamus.
D- Posterior Pituitary
Use the figure to match the following with a LETTER: This gland produces melatonin.
C- Pineal gland
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
46 chromatids
If one allele is not phenotypically expressed in the presence of another allele, we say that it is a(an) ______ allele.
recessive
Germ cells have ______ unpaired chromosomes and are thus called _____ cells.
23; haploid (n)
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?
25%
Use the figure to match the following with a LETTER: This gland produces glucocorticoids and mineralocorticoids.
K- Adrenal cortex
The alleles posessed by all members of a population collectively are called the____.
gene pool
Use the figure to match the following with a LETTER: This gland produces insulin and glucagon
G- Pancreas
Critical thinking Question:
Which blood type would NOT be possible for children of a type AB mother and a type A father?
O
Cancers in epiuthelial tissue are called ____
carcinoma
Cancers in bone, other connective tissue, or muscle are called _____
Sarcoma
Enviromental agents that can cause cancers are called ______
carcinogens
The organ systems rudimentarily (initially) form durning the:
embryonic period
Which of the following inplants in, or attaches to, the endometrium of the uterus?
blastocyst
What follows immediately after fertilization occurs?
cleavage
What is the neonatal period?
The first 6 weeks of life
What does the ectoderm form?
nervous system and skin
What does gastrulation accomplish?
formation of the three germ layers
Which statement is true regarding telomeres?
Telomeres are DNA segments at each end of a chromosome
Down Syndrome (trisomy-21) results from ______.
nondisjunction
Which is NOT an embryonic membrane?
- amion
- yolk sac
- placenta
- chorion
- allantis
Placenta
During implantation, the trophoblast divides into a superficial layer called the ____, which is composed of a multinucleate mass of cytoplasm.
syncytiotrophoblast
In the blastocyst, the trophoblast will become ____, whereas the embryoblast will become ____.
part of the placenta; the embryo
Twins produced when a single egg is fertilized are called ____ twins. Twins produced from 2 eggs ovulated at the same time are called ____ twins.
monozygotic; dizygotic
Use the figure to match the following with a LETTER: This gland produces and releases a hormone that raises blood calcium levels.
J- Parathyroid glands
What stimulates melatonin production?
Light and dark cycles
Which hormone lowers blood glucose levels?
Insulin
The effects of norepinephrine and epinephrine have nearly the same effects as the neurotransmitters of the:
Sympathetic Nervous System
What hormones are produced by zone glomerulosa of the adrenal cortex?
Mineralocorticoids
Which of the following is a gonadotropin?
- GH
- TRH
- FSH
- ACTH
FSH
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.
They release their secretions into the blood.
Use the figure to match the following with a letter:
This neuroendocrine organ (gland) produces and releases Catecholamines
L- Adrenal Medulla
Which of the following is the last step in the sequence of events happening when cyclic AMP (cAMP) acts as a second messenger?
Enzymes are activated or deactivated by the action of protein kinases
