Virtual Lab Assignment Questions

Identify each section A band: I band: M line H zone: Z disk:

A band: only actin I band: myosin & actin M line: midline H zone: only Myosin Z disk: separates individual sarcomeres

the structural and functional unit of skeletal muscle is called a(n)... A. myofibril B. myosin C. Sarcomere D. Fiber E. fascicle

C. Sarcomere

The ______ of the reflex hammer is used to touch a finger over a structure in the body A. none B. metallic tip C. pointed side D. broad flat side

C. pointed side

What can you measure using an EMG (electromyography) concerning the recruitment of motor units? Select all the apply A. the number of active motor units recruited B. the size of the muscles being used C. the applied force generated D. the firing frequency of an individual motor unit

C. the applied force generated D. the firing frequency of an individual motor unit

which of the following resting HR would be consider hypertension? A. 120/80 mmHG B. 110/70 mmHG C. 100/60 mmHg D. 135/90 mmHG

D. 135/90 mmHG

The sounds heard during the first phase of blood-pressure measurement are called? A. systolic sounds B. heart murmurs C. diastolic sounds D. Korotkoff sounds

D. Korotkoff sounds

All the fibers in one muscle that a simple motor innervates makes up a(n) A. nerve junction B. synapse C. sarcomere D. motor neuron

D. motor neuron

When testing tonicity of red blood cells, if the solution became transparent after adding blood cells, you would assume A. the solution was isotonic, the cells had burst B. the solution was hypertonic, the cells had shrunk C. the solution was hypotonic, the cells remained intact D. the solution was hypotonic and the cells burst E. the solution was hypertonic and the cells remained intact

D. the solution was hypotonic and the cells burst

In the pillbug experiment, your hypothesis... A. had to be supported by your data (proving your hypothesis was true) B. was formulated after you completed the experiment C. was related to the food pillbug prefer D. was related to the environment pill-bugs prefer

D. was related to the environment pill-bugs prefer

When testing osmosis by measuring thistle tube height, what is the first step in the procedure? A. place the distilled water into the thistle tubes B. Check the height of the liquid in the thistle tube C. Pout sugar solution into beaker D. Measure the rate of osmosis E. apply membranes to the thistle tubes

E. apply membranes to the thistle tubes

What happens in the QRS complex?

ventricular depolarization and atrial repolarization

What happens in the T wave?

ventricular repolarization

The _______________ of the reflex hammer is used to tap on tendons or ligaments A. Broad flat side B. pointed side C. metallic side D. none

A. Broad flat side

***In the demonstrate Monosynaptic Reflexes Lab, why do reflexes occur? Select all that apply A. by triggering the tendon of a muscle you are initiating the reflex arc B. by triggering the stretch receptors in the muscle you are initiating the reflex arc C. by triggering a skin receptor near the muscle you are initiating the reflex arc D. by triggering the muscle effector you are initiating the reflex arc E. By triggering the efferent motor neuron you are initiating the reflex arc

A. by triggering the tendon of a muscle you are initiating the reflex arc D. by triggering the muscle effector you are initiating the reflex arc E. By triggering the efferent motor neuron you are initiating the reflex arc ** I don't feel like these are right

When utilizing the scientific method, there are two types of variables. They are... A. dependent and independent B. postive & negative C. X varient & Y varient D. Hypothetical and experimental

A. dependent & independent

What do you do in the hypothesis phase? A. formulate a tentative explanation to your question or observation B. repost your data to others C. see if the data fits with the hypothesis D. collect data and analyze results

A. formulate a tentative explanation to your question or observation

The __________ of the reflex hammer is used to touch and move areas of the skin A. metallic tip B. broad flat side C. pointed side D. none

A. metallic tip

The thick filament of a sarcomere is composed of a protein A. myosin B. actin C. Troponin D. Sarcolemma

A. myosin

Which of the following areas can you use the broad flat side of the reflexes hammer to test reflexes? select all that apply A. Patellar B. Calcaneal C. Biceps Brachii D. Triceps Brachii E. Plantar

A. patellar C. biceps brachii D. triceps brachii

What is the purpose of a control group in scientific experiments? A. the control group undergoes standard or no treatment and serves as a baseline for the group receiving an experimental treatment B. The control group allows the experimenter to determine whether their data is statistically valid C. it is the group that responds to an experimental treatment

A. the control group undergoes standard or no treatment and serves as a baseline for the group receiving an experimental treatment

tonicity in a cell refers to the concentration of solute in a solution of a cell, relative to... A. the solute concentration of the cytoplasm inside the cell B. the number of cell fragments inside the cell C. the swelling of the cell D. the presence of a cell wall E. the permeability of the cell membrane

A. the solute concentration of the cytoplasm inside the cell

why did the pulse rate decrease 5 minutes after exercise? A. the tissue demand for oxygen had decreased B. the tissue demand for oxygen had increased C. stroke volume decreases so HR also decreased D. five minutes after exercising our heart are pumping more effectively E. stroke volume increases so HR also increased

A. the tissue demand for oxygen had decreased

During osmosis, water will move in which direction? A. from high solute concentration to low solute concentration B. from low solute concentration to high solute concentration C. from high to low temperatures D. from a lower energy state to a higher energy state

B. from low solute concentration to high solute concentration

When particles move out of cells and water moves in, that response is due to what kind of environment A.hypotonic B. hypertonic C. Isotonic D. Diffusion E. Ionic

B. hypertonic

when testing diffusion over a selectively permeable membrane, you placed different liquids into special containers. The proper setup was to... A. place one concentration of corn syrup into the beakers, & a different concentration of corn syrup into the thistle tube B. place a different concentration of corn syrup into the thistle tubes and distilled water into the beakers C. place different concentrations of corn syrup into the beakers, leave the thistle tubes empty D. place different concentrations of corn syrup into the breakers, and distilled water into the thistle

B. place a different concentration of corn syrup into the thistle tubes and distilled water into the beakers

which of the following do you think would be the most common artery palpated to determine HR? A. Termoral artery B. radial artery C. popliteal artery D. posterior tibial artery

B. radial artery

In the pillbug experiment, the substance used to control was... A. water B. sand C. the dish D. cornstarch

B. sand

Which type of motor units are activated for the longest time during low to moderate level exercise? A. fast-glycolytic B. slow-oxidative C. fast-oxidative

B. slow-oxidative

Muscles are connected to bones by A. motor unit B. tendons C. motor axons D. joints

B. tendons

Each motor-unit action potential (MUAP) recorded in an EMG signal corresponds to... A. the sum of all motor units in a signal muscle B. the sum of the electrical potentials from all the muscle fibers of a motor unit C. The action potential of each individual muscle fiber innervated by the same motor neuron

B. the sum of the electrical potentials from all the muscle fibers of a motor unit

what type of solution causes cells to swell?

hypotonic