science teas, part 2

carbon has an atomic number of 6. which is true regarding isotope C-12?

C-12 possess 6 protons and 6 neutrons in its nucleus

which of the following best describes adaptive immunity?

a response to specific traits of specific pathogens

which of the following describes why water has a concave, or downward curving meniscus when poured in a glass beaker?

the adhesive forces are greater than the cohesive forces

which of the following is a property of water

water dissolves polar ionic compounds

Lifelong protection after exposure to a virus such as chickenpox is due to which of the following types of immunity ?

active

an example of active transport

movement of sodium and potassium across the cell membrane against their concentration gradient

which of the following body cavities is subdivided into the thoracic and abdominopelvic cavities?

ventral

mutations in which of the following cells can be inherited by the offspring?

ovarian

which of the following pancreatic secretions digests starch into disacharides

amylase

a cell is placed in a hypertonic solution. which of the following describes the resulting osmosis ?

there is a net flow of water out of the cell

when an ionic salt is dissolved in water, the ions CO3 & K are formed. which is the formula for salt

K2CO3

which of the following has the smallest atomic radius

C

which of the following is a flap of cartilage that prevents the movement of food into the trachea ?

epiglottis

which of the following is present in both prokaryotic and eukaryotic cells?

cell membrane

which of the following is part of the pulmonary circuit?

pulmonary vein

carbohydrates is composed of

monosacharides

histones are proteins associated with

DNA

which of the following layers of the skin contains glands and hair follicles

dermis

function of tendons

attach muscle to bone

which of the following actions does a hydrophilic hormone take to activate a target cell

the hormone binds to cell surface receptors of the target cells

which of the followings is a weakness of correlational study

can not determine causation

During muscle contraction, myosin crossbridges bind to active sites on __________.

actin molecules

which of the following vessels is responsible for carrying blood from the upper body to the right atrium of the heart?

superior vena cava

Permanent damage to which of the following types of tissues in the spinal cord will cause paralysis?

nervous tissue

The shortening of a sacromere in skeletal muscle is directly due to the interaction of which of the following?

myosin and actin

which of the following terms describes the removal of metabolic waste from the body

excretion

which of the following substances is excreted by sweat glands in response to the breakdown of proteins and formation of ammonia?

urea

Pathway of blood through the heart

vena cava-> R atria -> tricuspid valve ->R Ventricle -> pulmonary artery -> lungs -> pulmonary vein -> L atria -> mistrial valve ->L ventricles -> arteries to body

why vasectomy leads to infertility ?

the vasectomy blocks movement of sperm from a testis into the epididymis

which of the following occurs during inhalation

The diaphragm moves downward

which of the following describes the process by which solid dry ice (carbon dioxide) turns directly into carbon dioxide gas

sublimation

An equal mass of which of the following states of matter could completely fill either a 100 mL or 500 mL container?

gas

which of the following parts of the central nervous system releases chemicals that regulate the pituitary gland

hypothalumus

which of the following is used to indicate mass

mg

a researcher is gathering large amounts of data about pt's who have a common diease and the effectiveness of various medications in comparison to a placebo. which of the following types of graphs is the best way for the researcher to present the data?

line graph

a researcher collects high resolution photographs of the earth from outer space at annual intervals for the last decades. this data would be most useful to analyze which of the following ?

weather patterns during hurricanes