muscle and blood

Place the following events of excitation in the correct order.
1.ion channels on the sarcolemma open and sodium ions enter the muscle fiber
2.the entry of sodium ions into the muscle fiber depolarizes the sarcolemma
locally
3.acetylcholine is released from vesicles in the motor neuron into the synaptic
cleft
4.an action potential arrives at the axon terminal of a motor neuron
5.acetylcholine binds to ligand-gated sodium ion channels in the motor end plate

• 2, 4, 3, 5, 1

• 4, 3, 5, 1, 2

• 3, 4, 5, 1, 2

• 4, 5, 3, 2, 1

What do skeletal muscle contractions share in common with smooth muscle contractions?

• Both types of contractions consume very little ATP

• Both types of contractions generate little force or a weak force.

• both types of contractions do not require calcium ions for a contraction to occur.

• Both types of contractions result from thick and thin filaments sliding past one
  another

A muscle cell experiencing resting membrane potential is

• experiencing depolarization

• more negatively charged on its exterior than in its interior

• propagating an action potential

• polarized.

Which of the following statements is the most accurate description of the sliding filament
mechanism?

• Z discs slide over the thick and thin filaments.

• Both thick and thin filaments shorten.

• thick filaments shorten while thin filaments remain unchanged.

• Thin filaments slide past thick filaments towards the M line.

What does the depolarization of the transverse tubules (T-tubules) promote?

• binding of acetylcholine to ligand-gated sodium ion channels

• release of calcium from the sarcoplasmic reticulum

• release of acetylcholine from vesicles in the motor neuron into the synaptic cleft

• 
  entry of sodium ions into the muscle fiber through voltage-gated sodium ion
  channels

Which of the following is the name given to the union between carbon monoxide and
hemoglobin?

• carboxyhemoglobin

• carbaminohemoglobin

• oxyhemoglobin

• deoxyhemoglobin

Nora was exposed to radiation that caused her red bone marrow to make fewer red blood
cells. This condition is known as:

• aplastic anemia

• iron-deficiency anemia.

• sickle cell anemia.

• hemolytic anemia.

Select the correct pathway to form a monocyte through the process of leukopoiesis

• HSC, myeloid cell line, myeloblast, promyelocyte, monocyte band cell, monocyte

• HSC, myeloid cell line, monoblast, promonocyte, monocyte

• HSC, lymphoid cell line, myeloid stem cell, monoblast, promonocyte, monocyte

• HSC, lymphoid cell line, monoblast, promonocyte, monocyte

Which of the following blood types is incompatible for donation to A+?

• A−

• B-

• O-

• O+

Some rat poisons contain a toxin that blocks the liver's ability to utilize vitamin K.
Animals that consume this poison would have problems with

• agglutination

• erythropoiesis

• coagulation.

• hrombolysis.