questions and answers 2024\2025 A+
Grade
Normal blood pH level
- correct answer 7.35-7.45
Reticular activation system
- correct answer the part of the brain that is involved in attention, sleep, and arousal
Smooth Endoplasmic Reticulum (SER)
- correct answer the region of the endoplasmic reticulum that has few or no ribosomes on its
cytoplasmic surface and synthesizes carbohydrates, lipids, and steroid hormones; detoxifies chemicals
like pesticides, preservatives, medications, and environmental pollutants, and stores calcium ions
Erythrocytes
- correct answer red blood cells, carry oxygen
double replacement reaction
- correct answer AB + CD --> AD + CB/ Na2s+ Hci --> Naci + H2s
What is a decomposition reaction?
- correct answer A chemical reaction where one compound breaks down into two or more simpler
substances.
What is the general formula for a decomposition reaction?
- correct answer AB --> A + B
, single replacement reaction
- correct answer a chemical change in which one element replaces a second element in a compound
The alveoli, the tiny sacs inside our lungs, provide the ____________ to allow oxygen and carbon dioxide
to diffuse between the lungs and bloodstream.
- correct answer surface area
An efferent nerve can also be described as which of the following?
- correct answer motor neuron
The columns of the periodic table are called groups, which signify?
- correct answer are called periods which signify the highest energy level an electron in that element
occupies.
steps in the scientific method come first
- correct answer Observing a situation, natural phenomenon, or identifying a problem is the first step in
the scientific method, followed by forming a question, developing a hypothesis, conducting an
experiment, analyzing the results, and getting peer feedback/sharing the results.
What is the bonding of water molecule?
- correct answer Polar covalent
Which of the following properties of water allows pond insects like water striders to walk across its
surface without sinking?
- correct answer Hydrogen bonding
What is the part of the neuron that sends out stimuli?
- correct answer Axon
What are Dendrites?
- correct answer are short extensions of neurons that feel stimuli.
________ reactions require energy, while ________ reactions release energy.
- correct answer endergonic, exergonic