Which adrenal gland hormone plays a role in urine concentration in the kidneys?

A) cortisol
B) antidiuretic hormone (ADH)
C) aldosterone
D) sex hormone
E) epinephrine

The outermost region of the kidney is called the

A) adventitia.
B) mucosa.
C) pelvis.
D) cortex.
E) medulla.

DNA replication results in two new DNA molecules. Each of these new molecules

A) has two newly synthesized strands of nucleotides.
B) has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides.
C) has two strands of nucleotides from the parent.
D) has a single strand of nucleotides.
E) are incomplete copies of the original.

The cells of the distal convoluted tubules have numerous mitochondria to support active transport.

Which of the following best describes the structure of lymphatic capillary walls?

A) Thin-walled, with tightly joined squamous cells
B) Thin-walled, with tightly joined cuboidal cells
C) Thick-walled, with overlapping squamous cells
D) Thick-walled, with tightly joined squamous cells
E) Thin-walled, with overlapping squamous cells

A waitress that stands for hours and has a habit of crossing her legs when she sits will increase the chances of having blood accumulate in her

A) arteries.
B) veins.
C) capillaries.
D) left ventricle.
E) right ventricle.

Which skeletal muscle component includes all the others?

A) actin
B) myofibril
C) myosin
D) sarcomere
E) muscle fiber

What hormone that occurs in both plants and animals is responsible for operating stomatal closure in plants and regulating blood vessel diameter in mammals?

A) hydrogen peroxide
B) nitric oxide
C) salicylic acid
D) cytokinin
E) progesterone