As molly is walking across campus, a car swerves toward her. her heart races and sweat breaks out as she jumps out of harm's way. this mobilization of energy is due to the action of molly's nervous system.

The correct answer will be- sympathetic nervous system

Explanation:

The sympathetic nervous system is a part of the autonomic nervous system which produces fight or flight response.

The sympathetic nervous system responds to the stimulus by producing a neurotransmitter called acetylcholine which binds nicotinic acetylcholine receptors and activates them.

The activation of the receptors releases the nor-adrenaline and continuous response release the adrenaline from the adrenal medulla of the kidney. These chemicals produce the fight or flight response like the dilation of the pupil, increased heartbeat and others.

The jumping, heart race and the sweat observed in Molly this is due to the activation of the sympathetic nervous system.

Thus, the sympathetic nervous system is the correct answer.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.