Question

1. which of the following correctly sequences the steps of the scientific method?

a. question, observe, explain, design and conduct experiment, collect and analyze data, report findings
b. observe, question, make a testable explanation, experiment, collect and analyze data, state findings
c. form a hypothesis, observe, investigate a testable question, collect and analyze data, state results
d. design and conduct an investigation based on a testable question, form a hypothesis, collect data, state findings

1. what organ secretes insulin?

a. the stomach
b. the pancreas
c. the kidneys
d. the lungs

1. what is most likely to happen if a freshwater fish is put in salt water?

a. the salt water is hypertonic to the fish cells causing the cells to swell and get bigger.
b. the salt water is hypertonic to the fish cells causing the cells to lose water and shrivel.
c. the salt water is hypotonic to the fish cells causing the cells to swell and get bigger.
d. the salt water is hypotonic to the fish cells causing the cells to lose water and shrivel.

1. what organ system is directly involved with all homeostatic processes in the body?

a. nervous system
b. muscular system
c. digestive system
d. excretory system

1. according to the data and class discussion, the kidneys function is to remove all of the following except ______ from the blood and excrete it from the body as urine.

data table 2: medium water intake|concentration in the renal artery|concentration in the renal vein|concentration in urine
salts|140 (mmol/l)|132 (mmol/l)|12 (mmol/l)
glucose|102 (mg/dl)|102 (mg/dl)|0 (mg/dl)
urea|20 (mg/dl)|0 (mg/dl)|20 (mg/dl)
observations on urine: urine output is medium, urine is yellow.
a. urea
b. excess salt
c. excess glucose
d. excess water

1. which explanation is the best for why many sports drinks include sugar and electrolytes like sodium and potassium?

a. sports drinks provide sodium and potassium to help the sodium/potassium pump in our nerve cells.
b. sports drinks provide sugar to help with cellular respiration and help produce more atp.
c. sports drinks are mostly water to help replace lost water due to sweating.
d. all answers are correct.

Explanation:

1. The scientific - method steps are to first observe, then question, form a testable explanation (hypothesis), experiment, collect and analyze data, and state results.
2. The pancreas secretes insulin to regulate blood - sugar levels.
3. Salt water is hypertonic to freshwater fish cells, so water will move out of the cells, causing them to shrivel.
4. The nervous system is involved in regulating all homeostatic processes in the body.
5. The kidneys remove excess salt, excess water, and urea from the blood, but glucose is usually reabsorbed completely so not removed as excess.
6. Sports drinks provide sodium and potassium for the sodium/potassium pump in nerve cells, sugar for cellular respiration to produce ATP, and water to replace sweat - lost water.

Answer:

1. b
2. b
3. b
4. a
5. c
6. d