Which of the following contains a single immature egg cell that is released during ovulation?

The spaces between neurons are called?

synapses

An impulse travels down the axon of a neuron and reaches the terminus. There, chemicals are released in response, which travel across the synapse to the next neuron. Thus the impulse is transmitted to the next neuron.

Damage to the parathyroid would most likely affect which of the following?

bone density

The parathyroid controls calcium and phosphate levels, which are maintained by producing and reabsorbing bone tissue.

Which of the following is true for both chloroplasts and mitochondria?

they have a double membrane and contain maternal DNA.

The chloroplast is important for photosynthesis in plants and the mitochondria is essential for cellular respiration in both plants and animals. Both are organelles that have a double membrane and have their own DNA. The DNA in these organelles is maternal DNA, that is only inherited by the mother of the organism. DNA in all forms is double stranded and neither the mitochondria nor the chloroplast contain any forms of RNA.[Life Science]

Which of the following correctly describes a strong acid?

A strong acid completely ionizes in water.

Strong acids break apart into their constituent ions immediately when placed in water.

Which of the following cells carry oxygen?

erythrocytes

Erythrocytes are red blood cells that contain hemoglobin, which is responsible for carrying oxygen within the blood cell.

Which of the following biological macromolecules is non-soluble, composed of hydrocarbons, and acts as an important source of energy storage for the body?

lipids

Lipids, which include but are not limited to fats, are an efficient source of energy storage due to their ability to store nearly twice as much energy as carbohydrates and proteins.

Which of the following is a carbohydrate?

fructose

Carbohydrates, such as fructose, are sugars. DNA polymerase is a protein, vegetable oil is a lipid, and mRNA is a nucleic acid.

Which of the following occurs when a person is in a stressful condition?

Mobilization of glucose from the liver into the bloodstream

In response to stress, glucose is mobilized from the liver into the bloodstream in order to supply the energy needs of various cells in responding to stress. To ensure the optimal delivery of nutrients and oxygen to necessary muscles for a fight-or-flight response, blood vessels supplying the digestive system constrict while blood vessels supplying the skeletal muscles dilate.

T-lymphocytes mature and become functional in which of the following organs?

Thymus

Lymphocytes are produced in the bone marrow, but mature and become functional in two primary lymphoid organs. B-lymphocytes differentiate and mature in the bone marrow, while T-lymphocytes becomes functional in the Thymus.

Which of the following statements is true about hydrogen bonds?

They form between a partial positively charged region on one molecule and the partial negatively charged region on another molecule

Hydrogen bonding occurs between molecules when at least one contains a hydrogen atom and both molecules have a small electric charge because the molecule is polar. Polar molecules, such as water, result from one atom having a stronger pull on the shared electrons, which causes the atoms to have slight negative or positive charges. The slight positive charge of the hydrogen atoms allow them to form hydrogen bonds with the atoms in other polar molecules with slightly negative charges. Although hydrogen bonds are considered a weak attractive force, they are the strongest weak bonds (also known as “Vander Waal’s forces”) by far. As a result, hydrogen bonding is weaker than both ionic and covalent bonds. Water is strongly affected by hydrogen bonding. Because the hydrogen bonds attract water molecules to one another, water is more tightly packed in liquid form than in solid form, where the molecules are held further apart in a lattice.

Which of the following is the cartilaginous flap that protects the larynx from water or food while still allowing the flow of air?

epiglottis

The epiglottis is the protective flap at the entrance of the larynx.

What state of matter has a definite shape and definite volume?

solid

A solid has a definite shape and definite volume.

Which layer of the skin contains large numbers of blood vessels?

dermis

The dermis is the layer of the skin where blood vessels, hair follicles, and glands are found.